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WO/1991/006499A1 |
A roller (e.g. for use in high speed sheet processing) comprises an FRP core (1) and a metal sleeve (2) non-rotatably held on the core by an interference fit caused by hoop tension in the sleeve.
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WO/1991/001187A1 |
Method and apparatus for forming a duct section by means of cutting from a strip supply of sheet metal, a length of such metal to define a leading and trailing end thereof and advancing the length of sheet metal in the direction of its l...
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WO/1991/001195A1 |
A device for making tubular element of rectangular cross-section with transverse ribs for a heat exchanger, comprising a chuck (1) on which is mounted a cutting tool (5) whose working body has a front and a rear surface (6, 7) forming a ...
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WO/1990/014902A1 |
The invention relates to methods of metal processing by cutting. A method of making a tubular element with transverse ribs for a heat exchanger consists in that the cutting tool is rotated around the axis of a chuck (3) parallel to the a...
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WO/1990/013383A1 |
The present invention relates to a system for monitoring tension of a peeled strip (30) during threading of the strip (30) onto a coil wrapping assembly (58). Sensors (74) mounted on the coiler assembly (58) monitor strip tension during ...
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WO/1990/010511A1 |
A plate rolling apparatus, for rolling a plate (10) to form a pipe, which comprises a mandrel (11) with a gripper means (14) for engaging an edge of the plate (10) and a mandrel deflection limiting device (20, 21 and 22) located to impin...
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WO/1990/010513A1 |
A machine tool for cutting transverse ribs on a rectangular cross-section element for a heat exchanger has two instrument heads (5, 6) mounted on a stand (1) with the possibility of their synchronous rotation, their drives (15, 16) for t...
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WO/1990/010510A1 |
A plate rolling apparatus, for rolling a plate to form a pipe which may be tapered, a gripper rib (14) on the mandrel (11) for receiving the edge of a flat plate. The mandrel (11) being mounted between support frame ends (24, 25) and on ...
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WO/1990/010509A1 |
In the apparatus for the continuous production of small-diameter welded pipes, a strip (13) of metal is unwound and advanced through a degreaser (17) and passed through a forming machine (19) so as to assume a tubular configuration. The ...
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WO/1990/008719A1 |
A hollow worm conveyer (1) made of a strip material has a guiding surface formed by strips (2, 3, 4), whose edges are oriented along a spiral line both in the longitudinal and the transversal cross-section of the worm conveyer. The propo...
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WO/1990/007392A1 |
The invention concerns a method for manufacturing of square pipes from coated steel strips. Both sides of the strip are coated with metal, say zinc or aluminium. The strips also can be industrially painted e.g. with PVC-plastics directly...
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WO/1990/005598A1 |
The method consists in profiling a part of a cylindrical pipe by drawing it through a forming instrument and in reducing the pipe along its whole length so that the diameter of the cylindrical section of the pipe is equal to the diameter...
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WO/1990/001671A1 |
A crack growth limiter (1) consists of a pipe section (5) with insertions (6) of elongate form built into its walls and oriented at an angle to the expected crack growth direction. The insertions (6) are made of a material whose strength...
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WO/1989/011351A1 |
Corrugated, helically formed lock-seam tubing is formed in a machine wherein clinching rollers (2, 3) for closing the lock-seam (8) of the tubing are shaped so that the lock-seam (8) is displaced radially with respect to the circumferenc...
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WO/1989/009111A1 |
A method of making a tubular element with transverse ribs for a heat exchanger consists in cutting grooves on a tubular blank (1) so as to form protrusions (3), then the tubular blank (1) is made to rotate and a layer of metal is partly ...
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WO/1989/009107A1 |
A cutting instrument for making a tubular element with transverse ribs for a heat exchanger comprises a front conical surface (2) and a rear conical surface (3) of its working body, which form in their cross-section a cutting edge (4) an...
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WO/1989/005698A1 |
An inner tube (2) is inserted into an outer tube (1), and an annular high-frequency induction heater (4) or a burner, and a cooler (5) adapted to sprinkle cooling water, which are combined unitarily with each other, are inserted into the...
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WO/1989/005201A1 |
In order to wind a flat strip of material to form a tube (1) of constant peripheral length, the strip of material (3) is provided with markings (4). The distance (a) between the markings is predetermined from the desired peripheral lengt...
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WO/1989/005202A1 |
A process and an apparatus for producing spirally-seamed tubing from metal strip are disclosed. The edges (15) of the metal strip (12) are prepared and the metal strip is fed into a generally cylindrical forming head (13) to bring the pr...
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WO/1989/003730A1 |
An apparatus for making helically wound interlocked flexible pipe (66) includes a rotating head (64) mounted for rotation about a main shaft (22). Two supply spools (32, 34) of strip material (30) are mounted on the rear side of the rota...
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WO/1988/009231A1 |
The device is intended to be used for production of welded pipes of a diameter from 50 to 500 mm. The device comprises a cutting head (3), a mechanism (7) for pressing the cutting head (3) against the internal surface of the pipe (6) pro...
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WO/1988/007897A1 |
In a process and devices for the manufacture of pipes with longitudinal seams made from strip material wound on a coil, the strip material is wound off the coil and conformed into a pipe billet round of approximately -shaped cross-sectio...
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WO/1988/005351A1 |
A method of producing lightweight metal structures provides for feeding a strip material from a coil (2) and straightening it. Then, before bending, the strip material is cut along a zigzag line into at least two elements (5, 6, 7), each...
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WO/1988/005349A1 |
A method for removing the internal burrs inside a longitudinally welded pipe consists in mounting the cutters (3) at an equal distance (K) from one another and at the same level in relation to the generatrix of the longitudinally welded ...
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WO/1988/005350A1 |
A method of producing lightweight metal structures provides for feeding a strip material from a coil (2) and straightening it. Then, before bending, the strip material is cut along a zigzag line into at least two elements (5, 6, 7), the ...
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WO/1988/004968A1 |
A pair of slit type horizontal fin rolls (18) and a pair of vertical side rolls (19) having such a shape as having the conventional vertical side roll (19) formed by contracting its center portion are utilized, and due to the constructio...
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WO/1988/004584A1 |
Method of and tool bit for making a hole and a hole-surrounding flange in the wall of a workpiece. The rotatable tool bit includes a piercing head (2), followed in the advancing direction by a helical profile (3) whose lower section (4) ...
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WO/1987/002287A1 |
The tube to be produced consists of a wear-resistant internal tube (1) and a shock-resistant external tube. The internal tube (1) is prefabricated. The external tube is made from an initial pre-curved metal sheet (2), made by bending aro...
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WO/1987/001626A1 |
An apparatus for manufacturing a thin metal strip (22) from a cylindrical metal workpiece (12) includes a rotatable workpiece support structure (10) for concentrically mounting the workpiece, drive means (14) for rotating the workpiece a...
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WO/1987/000773A1 |
A roll forming process utilizes as a feedstock hot rolled steel strip (1) and during the roll forming process the surface of the steel strip (1) is cleaned and polished by the combined effects of deformation and frictional contact betwee...
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WO/1986/004274A1 |
The method according to the invention relates to the making, without material removal, of grooves such as helical threads on the wall of tubes made of ductile or plastic materials. It consists in operating a knurling roller (11) having a...
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WO/1986/002025A1 |
When helically winding sheet or band material without core in order to obtain tubes (12) having essentially a square cross-section, the continuously fed band (1) is periodically bent by an inner angle of the cross-section. The band (1) i...
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WO/1986/001752A1 |
A method for providing a tubular node in frame work struss structures, such as offshore platforms for oil drilling and production activities of the type consisting of interconnected legs and braces of steel tube elements. For formation o...
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WO/1985/004242A1 |
An integrally formed hairpin configured metallic tube, comprising two parallel leg portions (2, 2') of oblong cross-section connected together by an U-shaped bend portion (3) of substantially circular cross-section. A method of manufactu...
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WO/1985/003755A1 |
A strip (1) adapted to form a tube by helically winding and having a series of longitudinal ribs (2) upstanding from a base on the strip and transversely spaced thereon in which one rib (4) has a bulbous end portion (9) and another has a...
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WO/1985/003114A1 |
The method for making the failure-resistant damper provides for fabricating a hollow cylindrical blank (1) of which the multilayer wall is provided with an artificial discontinuity (2) taking place at least in one of its layers. The diam...
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WO/1985/000023A1 |
Pipe deforming apparatus in which a pipe (12) is pushed through a heating station (13) by a hydraulically actuated pushing ram (15) and is caused downstream of the heating station (13) to curve at the heating station (13) by means of a c...
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WO/1984/003548A1 |
The connection threading of a metal pipe (1) for a fluid under high pressure comprises a conical opening intended to receive a conical seal ring (3). The conical seal ring has a cylindrical opening adapted to the outer diameter of the pi...
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WO/1984/002482A1 |
A tubular spacer bar (16, 48) for use in the construction of hermetically sealed multipane windows is formed of a metal strip having a first edge portion (18, 50) and a second edge portion (19, 70) that are brought together to form a sea...
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WO/1984/001914A1 |
Automatic or semi-automatic electric resistance continuous mash seam welding of can bodies comprised of sheet-metal parts which are overlapped and rolled into can bodies (20), with a guiding device arranged upstream of the welding statio...
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WO/1984/001728A1 |
Diagonal cutter for cutting-off of a metal-sheet band intended for a spiral-seamed pipe, the said cutter comprising a frame and two disc-shaped shear blades (13, 23) supported on separate, parallel shafts of rotation (10, 20), the circum...
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WO/1984/001609A1 |
A bellows capsule (10) for use in applications where the pressure on the outside of the bellows capsule is substantially higher than that on the inside is formed with spacer rings (42) positioned between the diaphragms (286, 326) forming...
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WO/1984/000387A1 |
Vertical chlor-alkali cell metal anode (13) in the shape of a double L having a hollow interior (27) and a footing (21, 28) which can be attached to the anode's base by manipulations external to the anode's interior (27) and whose hollow...
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WO/1983/004196A1 |
A machine for forming helically wound pipes from a strip (15), having interengaging means on its longitudinal edges, in which a series of rollers (2 and 3) is positioned to form an annulus of rollers (2 and 3) arranged to curve the strip...
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WO/1983/003374A1 |
Method for the manufacture of a conical tubular member, and a member manufactured according to the method, in which as a first step a tubular member is formed, having inwardly directed profilings (2, 2', 3, 3'), and that said member ther...
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WO/1983/002576A1 |
The device for sizing tubes by applying liquid pressure comprises a dismountable matrix (2) with a lock, which matrix is arranged on a bed (1) and is provided with a horizontally-orientated sizing channel (3) which is conformed to a tube...
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WO/1982/003191A1 |
The invention makes the production of bent tubes possible by cold drawing of a hollow tube blank (10) in one operation for reduction of the outer diameter and the wall thickness. It is characterized in that a straight tube blank is drawn...
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WO/1982/002350A1 |
A machine for making bodies of multilayer high-pressure vessels comprises rotators (3) of the body (1) of a high-pressure vessel between which are fixed butt-end parts of the body (1) of the high-pressure vessel. The body (1) of the high...
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WO/1982/002156A1 |
A device for helical arrangement of the bodies of high-pressure vessels comprises a frame (4) mounted movably along the axis of the body (1) of a high-pressure vessel. The lower part of the frame (4) carries a pressing mechanism (50 moun...
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WO/1982/001835A1 |
A machine for removing the internal bead of longitudinal seam welded tubing by flattening includes a mandrel (42) to be positioned within the tubing (11), an external hammer which includes a vertically oscillating roller (26) which hamme...
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